<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        s {
            color: rgb(39, 183, 240);
        }
    </style>
</head>

<body>
    <button class="anniu">
    <h1>按钮</h1>
        </button>
</body>
<script src="./js/jquery.js"></script>
<script>
    $(".anniu").css({
        "background":"rgb(21, 179, 241)",
        "width":"70px",
        "height": "40px",
        "font-size": "7px",
        "color":"white",
        "border": "0",
    })
    
</script>

</html>